Air hose connection



Feb. 16, 1932. A. s. MARCHUS 1,345,922

AIR HOSE CONNECTION Filed Jan. 29, 1950 N V EN TOR.

BY I

X 9 LM A TTORNEYS.

Patented Feb. 16, 1932 v 1,845,922

UNITED STATES PATENT OFFICE AIDS 8. BEHUS, OFOAILAND, CALIFORNIA.

Am noes commc'rron Application mm January as, 1930. serial No. 424,220.

This invention relates to air hose conneccates with the counterbore 16 and is arranged tions used in connection with air delivery deconcentric thereto as illustrated. This air vices at automobile service stations for induct 17, of course, communicates with a valve flating and testing pneumatic tires. chamber 18 in the end of the fitting 11. The

It is the princi al object of the present duct 1? permits air to pass from the valve 55 invention to provi e an improve swivel conchamber to the hose or vice versa depending nection between an air nozzle fitting and a upon the o ration of the gage structure to hose to enable the same to be relatively rowhich the tting is connected. tated without permitting the leakage of air Rotatably connectedwith the barrel 14 of therebetween. the fitting 11 is a s indle 19. The inner end. so

In carrying the invention into practice I of this s lndle is en arged as at so as to ro-- provide a nozzle fitting having a counterbore tatably t within the main bore 150i the bartherein. A hollow spindle projects into the tel 14. This end of the spindle is formed fitting and is formed with a bore complemenwith a counterbore 21 of the same diameter 15 tal to the counterbore. The hose is attached and depth as the.counterbore 16 inthe barrel.

to this hollowspindle. To prevent leakage The inner end of the spindle 19 abuts against 5 between the spindle and the fitting. I prothe annular shoulder which is formed bevide an expansible member fitting within the tween the main bore 15 and the countercounterbore of the fitting and the bore of the. bore 16 asillustrated.

20 spindle. This member is expanded by the To rotatably maintaln thespmdle 1!? 1n air pressure in the fitting to maintain an air this position I rovide a bushlng or retainer tight seal between the fitting and the spindle 22 having a cylindrical portion 23. Thls rewhile permitting the same to relatively rotainer 22 is bored to a diameter rotatably retate. ceiving the cylindrical body portion of the One form which the invention may assum spindle 19. The outer diameter of the reis exemplified in the following description tainer 22 is such that it may be inserted 1'11 and illustrated by wayof example in the acthe main bore 15 of the barrel 14 and abut companying drawings, in which: against the'annular shoulder on the splndle Fig. 1 is an enlarged view in central longiformed between the enlarged lnner end tudinal ction through a device embodying thereof and the body portion. The retainer the preferred form'of my invention. 22 is'form'ed with threads 24 at its outer end Fig. 2 is a transverse section therethrough which are adapted to engage similar threads taken on line II-II of Fig. 1. formed in the outer end of the main bore 15'.

M Fig. 3 is a perspective view of the expansi- Thus, it is apparent that the spindle 19 1s e s eeve. a i V Fig. 4 is a perspective 'view of the spindle. barrel 14* betweenthe retainer 22 and the Referring more particularly to the ac-, shoulder intermediate the main bore 15 and companying drawings, I show a tire valve the counterbore 16 of the barrel 14. actuator fitting 11 and an air hose 12 to which The outer extremity of the retainer 22 1s it is connected. The present invention is parformed with a hexagon nut 25 by means of ticularly concernedin so connecting these two which it may be manipulated to connect it elements that they may rotate relative to each with thebarrel or disconnect it therefrom.

other without permitting aleakage of air at The outer en of the spindle 1. P j

their junction. J V a considerable distance beyondthe end of the To accomplish this the fitting 11 is formed barrel as illustrated and is formed with cirwith a cylindrical portion or barrel 14 which cumferential serrations. The outer diameter is formed with a longitudinal bore 15 terof this portion of the spindle 19 is greater minating at its inner end in a counterbore 16- than the'inner diameter of the hose 12 into This counterbore 16 is just slightly less than which it is to be inserted so that the serrathe main bore 15. An air duct 17..communitionson the spindle. 19 will be tightly emrotatably collared in the main bore 15 of the 85 ressure thereof asses throu h the assa e- P P g p g f abutting relation to the end of the main bore bedded in the'inner periphery of the hose so as to prevent the leakage of air therebetween.

It .will be noticed that the spindle 19 is formed with a longitudinal or concentrically-arra-nged air duct or passageway 26 which forms a communication between the counterbore 21in the spindle and the interior of the hose 12.

In order to prevent air leakage at the junction between the counterbore 16 in the barrel 14 and the counterbore .21 in the spindle 19 I provide an expansible sleeve 27. This sleeve is'of an outerdiameter agreeing with the diameter of the counterbores 16 and 21 and is of a length agreeing with the combined depths of the counterbores 16 and 21. The expansible sleeve 27 is arranged within these counterbores as illustrated. The inner diameter of the sleeve 27 is greater than the diameter of the air ducts 17 and 26. When air pressure is passing through the ducts 26 and 17 the pressure causes the expansible sleeve 27 to tightly contact with the peripheries of the counterbores 16 and 21 and to prevent leakage of air therebetween. This prevents leakage of air at the junction between the spindle and the barrel but at the same time permits relative rotation between the spindle and the fitting 11.

In operation of the device it is constructed and assembled as illustrated in the drawings and an air host 12 is connected with the projecting end of the spindle. The fitting 11 is engaged with the valve stem of a'tire and the valve in the fitting 11 depresses the tire valve stem so as to open the same and at the same time open the valve in the fitting, thus establishing communication between the air hose and the interior of the tire. The air ways 26 and 17 and the pressure thereo causes the expansible sleeve 27 to be expanded to form an air tight joint between the spindle and the fitting.

1 The manner in whlch the spindle is connected with the fitting 11 enables relative rotation between the fitting 11 and the spindle.

This is important in an air connection of the type here disclosed as it enables the fitting 11 to be disposed in any position to properly engage the tire thereof without twisting the hose 12.

From the foregoing it is obvious that I have provided an improved swivel connection between an air hose and an air fitting and while I have shown the preferred form of my invention it is to be understood that various changes may be made in its construction by those skilled in the art without de parting from the spirit of the invention as defined in the appended claims.

Having. thus described my invention, what I claim and desire to secure byLetters Patcut is:

1. A device of the'character described com- .diameter agreein counterbore, means connecting said tubular member to said fitting to positively hold the same from axial movement but permitting relative rotation between it and the fitting,

the inner end of said member being formed with a bore complemental to the counterbore, an expansible sleeve tightly fitting the bore in said tubular member and the counterbore,

said expansible sleeve being adapted to be radially expanded by air pressure passing through the fitting and through said tubular member whereb to prevent the leaka e of air around said tubular member from tween the ends of the tubular member and the counterbore.

-2."A swivel 'oint for the delivery end of an air hose inclu ing a member having a right angular portion atone end enclosing a valve chamber and a main bore extending inwardly from the other end thereof, said member being formed witha counterbore of reduced diameter concentric to the main bore and extending inwardly from the inner end thereof, an air duct extending concentrically from the inner end of the counterbore, a spindle adapted to be connected at one end to a conduit, the other end of said spindle being of a main bore and ein projected therein in and contiguous to the counterbore, means for maintaining a connection between the spindle and said member whereby the spindle 1s prevented from axial movement but free to revolve relative to the member, the inner end of said spindle being formed with a bore of same diameter as the counterbore, said spindle having an air duct formed longitudinally therethrough, a radially expansible sleeve of an exterior diameter agreeing with the diameter of the counterbore in the member and the bore in the spindle and being arranged therewith the diameter of the of an air hose comprising a fitting body hav ing a bore therein, a. restricted portion at the inner end of said-bore, a spindle rotatably mounted in the bore, an enlarged portion on the end of said spindle, said restricted portion and said enlarged portion being coaxial and abutting and having equal interior diameters, and a retaining gland between the fitting body and the spindle and engaging the enlarged portion of the spindle to maintain it in abutment with the restricted portion of the bore, and a radially expansible rubber sleeve fitting the restricted portion of the bore and the interior of the enlarged portion and adapted to be expanded by air pressure passing through the spindle to prevent leakage between the abutting ends of the enlarged portion of the spindle and restricted portion of the said bore.

4. A swivel connection for the delivery end of an air hose comprising a fitting body having a bore therein, a restricted portion at the inner end of said bore, a spindle rotatably mounted in the bore, an

the end of said spindle, said restricted portion and said enlarged portion being coaxial and abutting and having equal interior diameters, an expansible ring Within said portions forming an air seal between them, and a retaining gland between the fitting body and the spindle and engaging the enlarged portion of the spindle to maintain it in abutment with the restricted ortion of the bore.

AMO S. MARCHUS.

enlarged portion on 

